Convert //ash from scoped_ptr to std::unique_ptr

ash/wm/overview/window_selector.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/overview/window_selector.h"
 
 #include <algorithm>
 #include <functional>
 #include <set>
 #include <utility>
@@ skipping 263 matching lines @@
       container->AddObserver(this);
       observed_windows_.insert(container);
     }
 
     // Hide the callout widgets for panels. It is safe to call this for
     // root windows that don't contain any panel windows.
     static_cast<PanelLayoutManager*>(
         Shell::GetContainer(*iter, kShellWindowId_PanelContainer)
             ->layout_manager())->SetShowCalloutWidgets(false);
 
-    scoped_ptr<WindowGrid> grid(new WindowGrid(*iter, windows, this));
+    std::unique_ptr<WindowGrid> grid(new WindowGrid(*iter, windows, this));
     if (grid->empty())
       continue;
     num_items_ += grid->size();
     grid_list_.push_back(std::move(grid));
   }
 
   {
     // The calls to WindowGrid::PrepareForOverview() and CreateTextFilter(...)
     // requires some LayoutManagers (ie PanelLayoutManager) to perform layouts
     // so that windows are correctly visible and properly animated in overview
@@ skipping 340 matching lines @@
   for (size_t i = 0;
       i <= grid_list_.size() &&
       grid_list_[selected_grid_index_]->Move(direction, animate); i++) {
     selected_grid_index_ =
         (selected_grid_index_ + display_direction + grid_list_.size()) %
         grid_list_.size();
   }
 }
 
 }  // namespace ash